67790762729 has 4 divisors (see below), whose sum is σ = 67798363860. Its totient is φ = 67783161600.

The previous prime is 67790762723. The next prime is 67790762779. The reversal of 67790762729 is 92726709776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1546298329 + 66244464400 = 39323^2 + 257380^2 .

It is a cyclic number.

It is not a de Polignac number, because 67790762729 - 2²⁸ = 67522327273 is a prime.

It is a super-2 number, since 2×67790762729² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67790762723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3787172 + ... + 3805029.

It is an arithmetic number, because the mean of its divisors is an integer number (16949590965).

Almost surely, 2^67790762729 is an apocalyptic number.

It is an amenable number.

67790762729 is a deficient number, since it is larger than the sum of its proper divisors (7601131).

67790762729 is an equidigital number, since it uses as much as digits as its factorization.

67790762729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7601130.

The product of its (nonzero) digits is 28005264, while the sum is 62.

The spelling of 67790762729 in words is "sixty-seven billion, seven hundred ninety million, seven hundred sixty-two thousand, seven hundred twenty-nine".